A laminated body includes: a substrate portion composed of silicon carbide; and a graphene film disposed on a first main surface of the substrate portion, the graphene film having an atomic arrangement oriented with respect to an atomic arrangement of the silicon carbide of the substrate portion. A region in which a value of G′/G in Raman spectrometry is not less than 1.2 is not less than 10% in an area ratio in an exposed surface of the graphene film, the exposed surface being a main surface of the graphene film opposite to the substrate portion.
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1. A laminated body comprising: a substrate portion composed of silicon carbide; and a graphene film disposed on a first main surface of the substrate portion, the graphene film having an atomic arrangement oriented with respect to an atomic arrangement of the silicon carbide of the substrate portion, a region in which a value of G′/G in Raman spectrometry is not less than 1.2 being not less than 10% of the area of an exposed surface of the graphene film, the exposed surface being a main surface of the graphene film opposite to the substrate portion, the substrate portion has a disc-like shape, and the substrate portion has a diameter of not less than 50 mm.
A laminated structure consists of a silicon carbide (SiC) disc and a graphene film on one side of the SiC disc. The graphene's atomic structure is aligned in a specific orientation relative to the SiC's atomic structure. The SiC disc is at least 50mm in diameter. When analyzing the graphene using Raman spectrometry, at least 10% of the graphene's surface shows a G'/G ratio of 1.2 or higher, indicating specific graphene properties.
2. The laminated body according to claim 1 , wherein the graphene film covers not less than 95% of the first main surface of the substrate portion.
A laminated structure consists of a silicon carbide (SiC) disc and a graphene film on one side of the SiC disc. The graphene's atomic structure is aligned in a specific orientation relative to the SiC's atomic structure. When analyzing the graphene using Raman spectrometry, at least 10% of the graphene's surface shows a G'/G ratio of 1.2 or higher. The graphene film covers at least 95% of the SiC disc's surface.
3. The laminated body according to claim 1 , wherein the graphene film has a carrier mobility of not less than 5000 cm2/Vs.
A laminated structure consists of a silicon carbide (SiC) disc and a graphene film on one side of the SiC disc. The graphene's atomic structure is aligned in a specific orientation relative to the SiC's atomic structure. When analyzing the graphene using Raman spectrometry, at least 10% of the graphene's surface shows a G'/G ratio of 1.2 or higher. The graphene film has a carrier mobility of at least 5000 cm2/Vs, indicating high electrical conductivity.
4. A laminated body comprising: a substrate portion composed of silicon carbide; and a graphene film disposed on a first main surface of the substrate portion, the graphene film having an atomic arrangement oriented with respect to an atomic arrangement of the silicon carbide of the substrate portion, a region in which a value of GIG in Raman spectrometry is not less than 1.2 being not less than 10% of the area of an exposed surface of the graphene film, the exposed surface being a main surface of the graphene film opposite to the substrate portion, the graphene film covering not less than 95% of the first main surface of the substrate portion, the graphene film having a carrier mobility of not less than 5000 cm2/Vs, the substrate portion having a disc-like shape, the substrate portion having a diameter of not less than 50 mm.
A laminated structure consists of a silicon carbide (SiC) disc and a graphene film on one side of the SiC disc. The graphene's atomic structure is aligned in a specific orientation relative to the SiC's atomic structure. When analyzing the graphene using Raman spectrometry, at least 10% of the graphene's surface shows a G'/G ratio of 1.2 or higher. The graphene film covers at least 95% of the SiC disc's surface and has a carrier mobility of at least 5000 cm2/Vs. The SiC disc is at least 50mm in diameter.
5. An electronic device comprising: the laminated body recited in claim 1 ; a first electrode formed in contact with the exposed surface of the laminated body; and a second electrode formed in contact with the exposed surface of the laminated body and formed to be separated from the first electrode.
An electronic device includes a laminated structure composed of a silicon carbide (SiC) disc and a graphene film on one side of the SiC disc. The graphene's atomic structure is aligned in a specific orientation relative to the SiC's atomic structure. The SiC disc is at least 50mm in diameter. When analyzing the graphene using Raman spectrometry, at least 10% of the graphene's surface shows a G'/G ratio of 1.2 or higher. The device also has two electrodes on the graphene film's surface, separated from each other to allow for electrical measurements or device functionality.
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November 4, 2016
October 31, 2017
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